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Investigation on the part played by the solid electrolyte interphase on the electrochemical performances of the silicon electrode for lithium-ion batteries

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorULLDEMOLINS, Michel
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorLE CRAS, Frédéric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPHAN, Viet-Phong
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPECQUENARD, Brigitte
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
hal.structure.identifierInstitut pluridisciplinaire de recherche sur l'environnement et les matériaux [IPREM]
dc.contributor.authorMARTIN, Lucile
hal.structure.identifierInstitut pluridisciplinaire de recherche sur l'environnement et les matériaux [IPREM]
dc.contributor.authorMARTINEZ, Hervé
dc.date.created2011-11-23
dc.date.issued2012-01-21
dc.identifier.issn0378-7753
dc.description.abstractEnSilicon which has a theoretical capacity around 3500 mAh g−1 and low insertion/deinsertion potentials is one of the most promising candidates to replace graphite as a negative electrode in lithium-ion batteries. Electrochemical performances of Si electrodes are highly dependent on the quality of the SEI. Therefore, the effect of an electrolyte additive, the vinylene carbonate (VC) on electrochemical performances was investigated on sputtered silicon thin films which constitute a simple system (avoiding the use of binders or any conducting additive material). The addition of only 2% of VC significantly improves the capacity retention as well as the coulombic efficiency leading to a capacity retention of 84% after 500 cycles and a coulombic efficiency around 99.5%. To explain the behaviour differences, thorough electrochemical analyses (capacity, coulombic efficiency, polarization at half charge...) combined with scanning electron and atomic force microscopies were carried out. Some correlations have been established between the electrochemical performances and the morphology evolution of the electrode. Thus, VC limits the formation of cracks induced by repeated expansion/contraction cycles and the liquid electrolyte/electrode interactions. In addition, the mechanical pressure locally applied to the thin film allows to maintain a dense morphology and hence has a beneficial effect, too. These two key parameters limit the deterioration of the electrode over cycles.
dc.language.isoen
dc.publisherElsevier
dc.subject.enSilicon
dc.subject.enLithium-ion battery
dc.subject.enThin film
dc.subject.enVinylene carbonate
dc.subject.enElectrolyte additive
dc.subject.enSEI layer
dc.title.enInvestigation on the part played by the solid electrolyte interphase on the electrochemical performances of the silicon electrode for lithium-ion batteries
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jpowsour.2012.01.095
bordeaux.journalJournal of Power Sources
bordeaux.page245-252
bordeaux.volume206
bordeaux.peerReviewedoui
hal.identifiercea-00677078
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//cea-00677078v1
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